The World's most strongest, the fastest and the scariest roller coasters is the hypersonic roller coaster, the underwater roller coaster, the twister roller coaster, the dinosaur roller coaster and the volcano roller coaster.
The fastest roller coaster at Disney World is the Rock 'n' Roller Coaster Starring Aerosmith, which goes just under sixty miles an hour. The fastest ride at Disney World is Test Track, which has a maximum speed of 65 miles per hour.
As of 2014, the fastest roller coaster in the world is located in Dubai, at Ferrari World. It can achieve a top speed of 149 mph. The longest roller coaster in the world is in Japan. It is 8133 feet long. The world's steepest is also in Japan, with a drop angle of 121 degrees.